期刊
CHEMISTRY OF MATERIALS
卷 29, 期 3, 页码 1357-1361出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.6b05115
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资金
- National Science Foundation (NSF) [DMR-1334928]
- Department of Defense (DoD) through the National Defense Science and Engineering Fellowship (NDSEG) program
- MRSEC program of the National Science Foundation at the Materials Research Center of Northwestern University [DMR-1121262]
- MRSEC program (NSF Grant) [DMR-1121262]
- International Institute for Nanotechnology (IIN)
- State of Illinois, through the IIN
UiO-66 is an archetypal zirconium-based metal-organic framework (MOF) that is constructed from hexanuclear zirconium oxide clusters as secondary building units (SBUs) and 1,4-benzenedicarboxylate (bdc) linkers. For the first time, a room-temperature solution-based synthesis is reported for UiO-66 and several of its derivatives, UiO-66-X (X = NH2, OH, or NO2), resulting in materials that are as porous and crystalline as those made at elevated temperatures. In addition, via modulation of the temperature at which UiO-66 is synthesized, the number of defect sites can be varied. It was found through N-2 sorption isotherm analysis and potentiometric acid base titrations that increasing the synthesis temperature from 25 to 130 degrees C results in a systematic decrease in the number of defect sites in UiO-66. The results suggest that, with respect to this synthetic procedure, a maximal number of defect sites is achieved [similar to 1.3 missing linkers per Zr6O4(OH)(4)(bdc)(6)] at a temperature of 45 degrees C.
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